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Allochthony in major groups of crustacean zooplankton in boreal lakes – strongly contrasting patterns across space and time

Berggren, Martin LU ; Karlsson, Jan ; Ziegler, Susan E. ; Bergström, Ann-Kristin and del Giorgio, Paul A. (2015) ASLO 2015 Aquatic Sciences Meeting
Abstract
The role of terrestrial organic carbon for recipient aquatic ecosystems is intensively researched. A multitude of studies now show that terrestrially-derived carbon supports a significant share (allochthony) of consumer biomass in many freshwaters. However, little is known about the mechanisms by which terrestrially-derived carbon is transferred to the level of metazoan zooplankton, and whether these pathways vary among taxonomic and functional groups. Here we present stable isotope-inferred allochthony in three major groups of crustacean zooplankton – Cladocera, Calanoida and Cyclopoida – measured both seasonally and across wide ranges of environmental gradients in boreal areas of Canada and Sweden. Our data show strongly contrasting... (More)
The role of terrestrial organic carbon for recipient aquatic ecosystems is intensively researched. A multitude of studies now show that terrestrially-derived carbon supports a significant share (allochthony) of consumer biomass in many freshwaters. However, little is known about the mechanisms by which terrestrially-derived carbon is transferred to the level of metazoan zooplankton, and whether these pathways vary among taxonomic and functional groups. Here we present stable isotope-inferred allochthony in three major groups of crustacean zooplankton – Cladocera, Calanoida and Cyclopoida – measured both seasonally and across wide ranges of environmental gradients in boreal areas of Canada and Sweden. Our data show strongly contrasting patterns between taxa in the allochthony regulation. Whereas allochthony in calanoids was regulated by shortage of phytoplankton particles per se, both across space and time, allochthony in cyclopoids was related to food chains supported by dissolved organic carbon. Cladocerans showed the highest allochthony, but a more complex regulation. Terrestrial organic matter can be an important resource for cyclopoids and cladocerans on an annual basis, but it can also sustain otherwise herbivorous calanoids during low productivity conditions, e.g. in winter. (Less)
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organization
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type
Contribution to conference
publication status
published
subject
pages
1 pages
conference name
ASLO 2015 Aquatic Sciences Meeting
conference location
Granada, Spain
conference dates
2015-02-22 - 2015-12-27
language
English
LU publication?
yes
id
d01bb021-4c08-4667-a55f-40a7d68db770
date added to LUP
2018-07-05 15:43:27
date last changed
2019-11-05 08:19:49
@misc{d01bb021-4c08-4667-a55f-40a7d68db770,
  abstract     = {The role of terrestrial organic carbon for recipient aquatic ecosystems is intensively researched. A multitude of studies now show that terrestrially-derived carbon supports a significant share (allochthony) of consumer biomass in many freshwaters. However, little is known about the mechanisms by which terrestrially-derived carbon is transferred to the level of metazoan zooplankton, and whether these pathways vary among taxonomic and functional groups. Here we present stable isotope-inferred allochthony in three major groups of crustacean zooplankton – Cladocera, Calanoida and Cyclopoida – measured both seasonally and across wide ranges of environmental gradients in boreal areas of Canada and Sweden. Our data show strongly contrasting patterns between taxa in the allochthony regulation. Whereas allochthony in calanoids was regulated by shortage of phytoplankton particles per se, both across space and time, allochthony in cyclopoids was related to food chains supported by dissolved organic carbon. Cladocerans showed the highest allochthony, but a more complex regulation. Terrestrial organic matter can be an important resource for cyclopoids and cladocerans on an annual basis, but it can also sustain otherwise herbivorous calanoids during low productivity conditions, e.g. in winter.},
  author       = {Berggren, Martin and Karlsson, Jan and Ziegler, Susan E. and Bergström, Ann-Kristin and del Giorgio, Paul A.},
  language     = {eng},
  title        = {Allochthony in major groups of crustacean zooplankton in boreal lakes – strongly contrasting patterns across space and time},
  year         = {2015},
}